Q: Q: Misfire rough idle

asked by on

I needed to replace my raditaor so I did. it started to misfire and is barley idling. I replaced the plugs and the MAP sensor The O2 sensor is missing in the fuse box would that make the idle rough?
My car has an automatic transmission.

Changing the radiator should not have caused a misfire. Replacing the plugs and the MAP sensor was a great idea. What we commonly refer to as the O2 sensor is not located in the fuse box. There are two O2 sensors, and both of them are on your exhaust pipe. One is located between the engine and the catalytic converter. The other is located after the catalytic converter. These would make your engine idle roughly and not perform as desired. My thoughts are that you may have had more than one issue going on at the same time. With the age of your vehicle, its time for things to start showing some wear and tear. You should check your fuel filter and make sure it has flow. If it doesn’t allow gas to flow through it, your engine will be depleted of what it needs. Make sure your air filter is clean as well. If you would like, a certified technician from YourMechanic can come to your home or place of business to diagnose the rough idling.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Misfire rough idle

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Top water hose gets hot with new thermostat

Hello. This is completely normal operation of the vehicle's cooling system. The top radiator hose should always be warmer than the bottom. As coolant flows through the water pockets in the engine it picks up heat, and it is then...

Q: replacing a crankshaft sesor in a suzuki XL7

Hi there, thanks for writing in about your 2008 Suzuki. It may be caused by a timing belt that has jumped a tooth. A bad crank sensor will typically cause the ignition to not fire at all. For a more...

Q: Top makes high-pitched noise when moved - 2004 Cadillac XLR

This is probably the correct advice. The retractable top pump and fluid reservoir is behind a carpeted panel (left, rear trunk area). Your Owners Manual should show the reservoir (Max/Min marks) and indicate the correct GM fluid to top it...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.